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Can we pour concrete when there is standing water in the pit?

by admin on 25-10-31

To address this question, we must first determine whether water accumulation in the foundation pit affects concrete quality. According to Article 7.5.2 of GB/T14902 “Ready-Mix Concrete” standard: Concrete mixer trucks must completely drain water from mixing tanks before loading, and i...

There is water in the pit. Can we pour concrete?

by admin on 25-10-17

To address this question, we must first determine whether water accumulation in the foundation pit affects concrete quality. According to Article 7.5.2 of GB/T14902 “Ready-Mix Concrete” standard: Concrete mixer trucks must completely drain water from mixing tanks before loading, and i...

When should an underground continuous wall be used?

by admin on 25-09-28

Characteristics of Underground Continuous Walls An underground continuous wall is constructed using specialized excavation equipment. The process involves excavating a slot-shaped hole along the perimeter of a foundation or underground structure to specified dimensions, followed by installing ste...

Comparative analysis of rotary drilling rig with impact and rotary drilling rig

by admin on 25-09-17

The rotary drilling rig, a hole-forming equipment gaining widespread acceptance in recent years, has become a widely recognized method in underground foundation construction. As the fastest-developing innovative pile hole construction technique, rotary drilling cast-in-place piles are hailed as a...

Four steps to improve the construction quality of PHC pipe pile

by admin on 25-09-05

I. ACCESS CONTROL 1. The strength of the pipe pile shall reach 100% of the design value before it can be transported to the site. 2. The product qualification certificate, appearance and external dimensions shall be checked when entering the site. (1) Appearance: no honeycomb, exposed concrete, c...

Four steps to improve the construction quality of PHC pipe pile

by admin on 25-08-22

1. Entry control 1. The strength of the pipe pile shall reach 100% of the design value before it can be transported to the site. 2. The product qualification certificate, appearance and external dimensions shall be checked when entering the site. (1) Appearance: no honeycomb, exposed concrete, c...

Two technical methods to improve the bearing capacity of rotary pile

by admin on 25-08-08

At present, the common technical methods to improve the vertical bearing capacity of single pile in cast-in-place piles are foundation expansion method and post-grouting method. In the same stratum, pile end resistance is proportional to the pile’s end base area. When the pile...

When to do foundation pit support?

by admin on 25-07-24

Foundation pit support engineering is a high-risk technical field in the construction industry. Although the incidence of foundation pit accidents nationwide has been decreasing year by year, such incidents still occur from time to time. Improper design and substandard construction quality remain...

How to drill holes and deliver piles for pipe piles?

by admin on 25-07-10

Pier foundation hole leading method construction (1) The diameter of the pilot hole should not exceed 0.9 times of the diameter of the pipe pile, and measures to prevent collapse of the hole should be taken. The depth of the pilot hole should not exceed 12m; (2) It is advisable to use long spiral...

Construction plan of rotary drilling rig in karst stratum

by admin on 25-07-04

When drilling in karst areas, the slurry is prone to leakage, causing a sudden drop in the slurry level inside the hole. This can lead to the failure of the casing and result in borehole collapse. The fill material in karst areas is loose and has collapsed, and if the volume of the karst area is ...

Osaka to Kansai Expo Stage “Mengzhou Station” project

by admin on 25-06-27

The 2025 Japan International Expo (Osaka Kansai Expo) will take place on the artificial island of Dream Island in Osaka Bay. Plans include extending the subway, which will serve as the primary transportation route to the venue. Odaiba Corporation, responsible for constructing the port railway and...

Introduction to the process of continuous mixing wall with equal thickness cement soil

by admin on 25-06-17

▍ Introduction to TRD construction method The TRD method, also known as the equal thickness cement-soil underground continuous mixing wall method, operates on the principle of using a chain saw-type tool box to vertically penetrate the ground. The tool box then moves horizontally while the chain...